1 files changed, 85 insertions, 0 deletions
diff --git a/plugins/adplug/adplug/sng.cpp b/plugins/adplug/adplug/sng.cpp
new file mode 100644
index 00000000..bf0fa699
--- /dev/null
+++ b/plugins/adplug/adplug/sng.cpp
@@ -0,0 +1,85 @@
+/*
+ * Adplug - Replayer for many OPL2/OPL3 audio file formats.
+ * Copyright (C) 1999 - 2002 Simon Peter, <dn.tlp@gmx.net>, et al.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * sng.cpp - SNG Player by Simon Peter <dn.tlp@gmx.net>
+ */
+
+#include <string.h>
+#include "sng.h"
+
+CPlayer *CsngPlayer::factory(Copl *newopl)
+{
+  return new CsngPlayer(newopl);
+}
+
+bool CsngPlayer::load(const std::string &filename, const CFileProvider &fp)
+{
+  binistream *f = fp.open(filename); if(!f) return false;
+  int i;
+
+  // load header
+  f->readString(header.id, 4);
+  header.length = f->readInt(2); header.start = f->readInt(2);
+  header.loop = f->readInt(2); header.delay = f->readInt(1);
+  header.compressed = f->readInt(1) ? true : false;
+
+  // file validation section
+  if(strncmp(header.id,"ObsM",4)) { fp.close(f); return false; }
+
+  // load section
+  header.length /= 2; header.start /= 2; header.loop /= 2;
+  data = new Sdata [header.length];
+  for(i = 0; i < header.length; i++) {
+    data[i].val = f->readInt(1);
+    data[i].reg = f->readInt(1);
+  }
+
+  rewind(0);
+  fp.close(f);
+  return true;
+}
+
+bool CsngPlayer::update()
+{
+  if(header.compressed && del) {
+    del--;
+    return !songend;
+  }
+
+  while(data[pos].reg) {
+    opl->write(data[pos].reg, data[pos].val);
+    pos++;
+    if(pos >= header.length) {
+      songend = true;
+      pos = header.loop;
+    }
+  }
+
+  if(!header.compressed)
+    opl->write(data[pos].reg, data[pos].val);
+
+  if(data[pos].val) del = data[pos].val - 1; pos++;
+  if(pos >= header.length) { songend = true; pos = header.loop; }
+  return !songend;
+}
+
+void CsngPlayer::rewind(int subsong)
+{
+  pos = header.start; del = header.delay; songend = false;
+  opl->init(); opl->write(1,32);	// go to OPL2 mode
+}